Periodic table of elements

57 - Lanthanum [La]

57: Lanthanum - Lanthanum [La]
Group: 3
Period: 6
Atomic number: 57
Atomic mass: 138.90547
Configuration: [Xe] 5d16s2
Atomic radius: 250 pm
Covalent radius: 207 pm
Electron affinity: 48 eV
Ionization energy: 5.5769 eV
Electronic term: 2D3/2
Mass fraction in the earth crust: 0.000034
Mass fraction in the earth space: 0.000000002
Electronegativity: 1.1

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